#28B439
Closest named color: Shamrock (#01B44C). oklch(67.4% 0.2 144.4), rgb(40, 180, 57).
Aa
Black text reads best on this color (7.67:1).
About this color
#28B439 is a medium-light, vivid green. In OKLCH its lightness is 67%, its chroma 0.200 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Shamrock (#01B44C), ΔE 0.017 away. Black text reads best on it, at 7.67:1.
| Hue family | Greens |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.200) |
| Temperature | in between |
| Nearest name | Shamrock (#01B44C) |
| Black text | 7.67:1 |
| White text | 2.73:1 |
Values
| HEX | #28B439 |
| RGB | rgb(40, 180, 57) |
| HSL | hsl(127, 64%, 43%) |
| OKLCH | oklch(67.4% 0.2 144.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #28B439 | 2.73:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #28B439 | 7.67:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #28B439 text on white | 2.73:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #28B439 text on black | 7.67:1 | AAA | Lc -49.5 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#EFF9EF
oklch(97.2% 0.017 145.4)
-
Step 100
100
#DCF1DB
oklch(93.7% 0.037 144)
-
Step 200
200
#BEE6BD
oklch(88.6% 0.07 144.3)
-
Step 300
300
#8DD68D
oklch(81% 0.125 144.3)
-
Step 400
400 (this color)
#28B439
oklch(67.4% 0.2 144.4)
-
Step 500
500
#00A627
oklch(63% 0.201 144.5)
-
Step 600
600
#008C1F
oklch(55.6% 0.178 144.4)
-
Step 700
700
#007618
oklch(49.1% 0.157 144.4)
-
Step 800
800
#006112
oklch(42.8% 0.137 144.4)
-
Step 900
900
#00510E
oklch(37.8% 0.121 144.5)
-
Step 950
950
#003005
oklch(26.9% 0.086 144.4)
#28B439 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #B7A328 | 0.146 |
| Deuteranopia (no green cones) | #A89845 | 0.147 |
| Tritanopia (no blue cones) | #00AF9B | 0.125 |
| Achromatopsia (no color) | #9C9C9C | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #28B439
#28B439
oklch(67.4% 0.2 144.4)
- #D063DA
#D063DA
oklch(67.4% 0.199 324.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #28B439, closest first.
No curated palette has a color within ΔE 0.04 of #28B439.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Shamrock #01B44C ΔE 0.017
- Leafy Green #51B73B ΔE 0.027
- Medium Green #39AD48 ΔE 0.028
- Kelly Green #02AB2E ΔE 0.030
- Grass #5CAC2D ΔE 0.035
- Shamrock Green #02C14D ΔE 0.036
- Leaf Green #5CA904 ΔE 0.039
- Cool Green #33B864 ΔE 0.044
Use #28B439 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.